
where \(G^{m,n}_{p,q}\)  are the Meijer \(G\)  functions, defined according to
Ref. [1]}.
Finally, using known asymptotic expansions for the Meijer \(G\)  functions, we
obtain the asymptotics of the total cross-sections () for large
values of the fermion momenta \(p\)
\(\sigma _{\pm 1/2,\pm 1/2} &=&\frac{1}{8}\pi ^{3}h^{2}r_{0} \\&&\times \left( \left( 1+32h^{2}r_{0}^{2}\right) p^{-2}+O\left(p^{-4}\right) \right), \nonumber \\\sigma _{\mp 1/2,\pm 1/2} &=&\frac{3}{8}\pi ^{3}h^{2}r_{0}\left(p^{-2}+O\left( p^{-4}\right) \right). \) 
